Other current and historical names
Location and coordinates are for the approximate centre of Trecastle within this administrative area. Geographic features and populated places may cross administrative borders.
Gazetteer of the British Isles (Edinburgh: Bartholomew, 1887). John Bartholomew
Trecastle.-- vil., Traian Mawr with Trecastle Ward township, Lly well par., Brecknockshire, 10 miles W. of Brecknock; P.O.; adjacent are vestiges of an ancient castle; Trecastle Beacon is 2594 ft. high.